87750915 has 24 divisors (see below), whose sum is σ = 163325520. Its totient is φ = 40114368.

The previous prime is 87750907. The next prime is 87750919. The reversal of 87750915 is 51905778.

It is not a de Polignac number, because 87750915 - 2³ = 87750907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87750919) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58960 + ... + 60429.

It is an arithmetic number, because the mean of its divisors is an integer number (6805230).

Almost surely, 2^87750915 is an apocalyptic number.

87750915 is a deficient number, since it is larger than the sum of its proper divisors (75574605).

87750915 is a wasteful number, since it uses less digits than its factorization.

87750915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119411 (or 119404 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 42.

The square root of 87750915 is about 9367.5458365572. The cubic root of 87750915 is about 444.3759548050.

The spelling of 87750915 in words is "eighty-seven million, seven hundred fifty thousand, nine hundred fifteen".